subdomain issue with newsomatic

Hi, I'm structuring up my news blog via subdomains and separate wp installations and themes (ie. news.mydomain.com, blog.mydomain.com, woman.mydomain.com) that way I get nice "separation of concerns" and avoiding piling up everything in one huge site and slowing down wp installation, and now I cannot activate newsomatic plugin on a subdomains for some reason, it is saying that plugin is registered on mydomain.com and if I want to use it on subdomain, I need to revoke it! I think that envato allows plugin installation on subdomains since it is one site/product. Please help me with this, who do I contact, and where to send details? I want to be able to structure my site and activate plugin on one site/product in most optimal way, and not to be blocked by such constraints as if I'm reselling plugins or using it on different domains.